20PBF – Stability Control Brake Relay Hose Misconnected – 2020-2021 Peterbilt 520

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January 4, 2021 IMPORTANT SAFETY RECALL
Interim Notification
Subject: Safety Recall 20PBF – 520 Stability Control Brake Relay Hose Misconnected
NHTSA Recall number 20V739
VIN:
Dear Peterbilt Customer,
This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Peterbilt Motors Company has decided that a defect, which relates to motor vehicle safety, exists in certain Model 520 vehicles
manufactured between September 26, 2019 and July 22, 2020 with stability control and a spring brake modulator valve (SBM) or lift
axle. A stability control event meant only to actuate the ABS controlled wheel ends could actuate lift axle brakes or modulate
park brake chambers and could possibly de-stabilize the vehicle, increasing the risk of a crash.
The problem is… The stability control brake relay may have been plumbed incorrectly.
What your dealer will do… When Peterbilt has developed the proper repair prorcedure, your dealer will inspect
the stability control brake relays. If necessary, the relay will be plumbed correctly.
What you must do … TAKE NO ACTION AT THIS TIME.
You will receive a letter notifying you when your vehicle is eligible for repair.
Peterbilt has initiated a recall to correct the stability control plumbing. The repair procedure is not currently available. However,
Peterbilt is required to notify customers of the existence of the identified safety defect. You will be notified by mail when the repair
procedure is available.
If you require further information about this recall, reimbursement of a pre-notification remedy associated with this recall or experience
any difficulty in making arrangements for this repair, please contact: Peterbilt Motors Company, 1700 Woodbrook St, Denton, TX
76205, Attn: Customer Services Department, phone 940-591-4220.
If you conclude that Peterbilt Motors Company has not enabled you to remedy this noncompliance in reasonable time and without
charge, you may submit a complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E.,
Washington, DC 20590, or call the toll free Vehicle Safety Hotline at 1-888-327-4236 (TTY: 1-800-424-9153); or go to
https://www.safercar.gov.
Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten
days. If you no longer own this vehicle, we would appreciate your advising us of the new owner if you know their name.
We apologize for any inconvenience this preventive procedure may cause and thank you for your participation in helping Peterbilt
provide the highest levels of customer satisfaction and service expertise.
We value your business and appreciate your ongoing loyalty to Peterbilt and its dealer network. Industry-leading quality,
performance and reliability are hallmarks of Peterbilt products, and we thank you for making Peterbilt your truck of choice.
Sincerely,
Michelle Ponsonby
Director of Customer Service
Peterbilt Motors Company

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Federal Recall Information
Supplier
Peterbilt
Description
Model 520 Stability Control Brake Relay Hose Misconnected – NHTSA: 20V739
Release Date
12/2/2020
Introduction
Peterbilt has decided that a condition affecting vehicle stability may exist in certain Model 520 vehicles built from 9/26/2019
through 7/22/2020 with stability control and a spring brake modulator valve (SBM) or lift axle. A stability control event meant to
only actuate the ABS controlled wheel ends could actuate lift axle brakes or modulate park brake chambers and could possibly
de-stabilize the vehicle, increasing the risk of a crash.
Resolution
Safety Recall
Service all affected chassis that enter your dealership, even if the customer has no issue with the chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the
list.
2. If you are not using Service Management to start repair orders, review SIR for “Complete” or “In Process” next to the
“20PBF” campaign code prior to performing this repair.
3. Follow the procedures below inspect the valves and repair if necessary.
It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or noncompliance has
been corrected.
Warranty
There is no time or mileage limit for this recall. Peterbilt will pay for parts at dealer net plus applicable mark up and labor:
If filing in PRWS:
0.4 hours to inspect and repair a relay valve. Use recommended repair 20PBF.
Includes inspecting the valve, adding necessary fittings and rerouting the hoses.
Claim once for each relay valve that is inspected and repaired.
Cannot be claimed with SRT 013-131.
0.3 hours to only inspect the relay valve(s). Use recommended repair 20PBF1.
20PBF
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Includes inspection of multiple valves.
To be used when no repair is necessary.
Cannot be claimed with SRT 013-130.
If filing using DWC:
0.4 hours to inspect and repair a relay valve. File a long form claim and reference 20PBF.
Includes inspecting the valve, adding necessary fittings and rerouting the hoses.
Claim once for each relay valve that is inspected and repaired.
Cannot be claimed with SRT 013-131.
0.3 hours to only inspect the relay valve(s). File a long form claim and reference 20PBF.
Includes inspection of multiple valves.
To be used when no repair is necessary.
Cannot be claimed with SRT 013-130.
PRWS CLAIM CODING
Campaign Code: 20PBF Campaign Type: Safety Recall
Claim Category: Truck Repair Type: Proactive
Customer Concern
Code:
029 Causal Code: A1
Failure Location: 015-012-011 Causal Part: K070684
Corrective Action
Code:
12 SRT Code: SRT 013-131
0.4 hours to inspect and
repair a relay valve. Includes
inspecting the valve, adding
necessary fittings and
rerouting hoses. Claim once
for each relay valve that is
inspected and repaired.
Cannot be claimed with 013-
130.
SRT 013-130
0.3 hours to only inspect the
relay valve(s). Includes
inspection of multiple valves.
To be used when no repair is
necessary. Cannot be
claimed with 013-131.
DWC CLAIM CODING
Failure Location: 015-012-011 Work Accomplished:
Failure Type: 705 Responsibility Code: 09
SRT Code: SRT 013-131
0.4 hours to
inspect and repair
a relay valve.
Includes
inspecting the
valve, adding
necessary fittings
and rerouting
hoses. Claim
once for each
relay valve that is
inspected and
repaired. Cannot
be claimed with
013-130.
SRT 013-130
0.3 hours to only
inspect the relay
valve(s). Includes
inspection of
Claim Type: C
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Take off parts disposition: Destroy parts 30 days after the claim has been paid.
Parts
Parts are available from PACCAR parts.
Procedure
Please follow your dealership’s safety procedures and precautions to ensure the vehicle can be safely repaired and maintained.
1. Refer to the image below that shows a correctly plumbed relay valve.
2. Inspect the truck to see if the relay valve(s) are plumbed correctly. If plumbed correctly, no further action is required.
3. If the relay valve(s) are not plumbed correctly, refer to the Repair Procedure in the Attachment section to correct the
plumbing.
multiple valves.
To be used when
no repair is
necessary.
Cannot be
claimed with 013-
131.
Quantity Part Number Description
1 per relay*
AP2022 Adapter Tee
1 per relay*
KV2H11-35S Male Connector
1 per relay*
AP2348 Plug
As Needed
Source Locally Thread Sealant
*Refer to the attached Chassis List to determine how many valves need to be inspected
and, if necessary, repaired.
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Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed through
this system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly confidential
pursuant to the contract licensing such access. Disclosure, publication, release or distribution of any material found on PACCAR systems to
any person other than employees with a need to know such information is strictly prohibited. All activity on this system is monitored. If
PACCAR suspects or discovers any unauthorized activity, access may be immediately terminated without prior notification. Violators may be
subject to legal action.
© Copyright 2021 PACCAR Inc. All rights reserved. We welcome your feedback on this page. For technical questions or concerns about this
page, please contact the DealerNet Webmaster.
Attachments
Chassis List
Customer Letter
Repair Procedure
Revisions
01/20/2021 – The bulletin has been updated with the repair procedure and the chassis list. The description of the issue and the
introduction have been updated to match the NHTSA approved language.
Authored by: PR
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1/5/2021 20PBF – Model 520 Stability Control Relay Plumbing .. AMCOIAQOMIWII”
Federal Recall Information
20PBF
Supplier
Peterbilt
Description
Model 520 Stability Control Relay Plumbing – NHTSA: 20V739
Release Date
12/2/2020
Introduction
Peterbilt has decided that a condition affecting vehicle stability may exist in certain Model 520 vehicles built from 9/26/2019
through 7/22/2020 with stability control and a spring brake modulator valve (SBM) or lift axle. The Stability Control Relay
may have been plumbed incorrectly, which could cause a stability event that may actuate the lift axle brakes or modulate the
park brake chambers, which could destabilize the vehicle.
Resolution
Safety Recall
This bulletin will be updated as soon as an affected chassis list is defined and a repair procedure is developed.
It is a violation of Federal law for a dealer to sell or lease new vehicles covered by this recall until the defect or
noncompliance has been corrected.
Access to PACCAR’s Enterprise Portal is provided as a benefit of doing business with PACCAR. All applications and content accessed
through this system are confidential and proprietary and the property of PACCAR Inc and its suppliers, and must be kept strictly
confidential pursuant to the contract licensing such access. Disclosure, publication, release or distribution of any material found on
PACCAR systems to any person other than employees with a need to know such information is strictly prohibited. All activity on this
system is monitored. If PACCAR suspects or discovers any unauthorized activity, access may be immediately terminated without
prior notification. Violators may be subject to legal action.
© Copyright 2021 PACCAR Inc. All rights reserved . We welcome your feedback on this page. For technical questions or concerns
about this page, please contact the DealerNet Webmaster.
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